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Key Function Descriptions
Key Descriptions
Turns the video averaging ON or OFF. Video
VID AVG ON OFF
averaging smooths the displayed trace without using a
narrow video bandwidth. The function sets the detector
mode to sample mode and smoothes the trace by
averaging successive traces with each other.
Front-panel key access:
Sets the trigger to video mode. Sweep triggers occur
VIDEO
whenever the input signal passes through the video
trigger level with a slope determined by the TRIG POL
POS NEG function. This trigger level can be changed
using the data keys, the step keys, or the knob. A
dashed line appears on the screen to denote the
selected level. Note that in 1 dB per division, the error
in this line can be up to three divisions.
Front-panel key access:
VIDEO BW AUTO MAN
the active function block, and ranges from 1 Hz to 3
MHz in a 1, 3, 10 sequence. The value can be changed
using the data keys, the step keys, or the knob. A line
under AUTO or MAN indicates whether the bandwidth
is coupled (AUTO) or is in manual mode (MAN). When
the video bandwidth is in manual mode, press VIDEO
BW AUTO MAN until AUTO is underlined to return
the bandwidth to coupled mode. When the video
bandwidth is less than or equal to 100 Hz and the
resolution bandwidth is greater than or equal to 300
Hz, the detector mode automatically changes to sample
mode.
Front-panel key access:
Displays the current contents of trace A, but does not
VIEW A
update the contents.
Front-panel key access:
Displays the current contents of trace B, but does not
VIEW B
update the contents.
Front-panel key access:
286
BW
TRIG
Adjusts the video bandwidth, which appears in
AUTO COUPLE
TRACE
TRACE
or
TRACE
or
BW
Chapter 4
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